animal Animals 238 metabolism 218 nonhuman 202 controlled study 176 enzyme activity 166 article 142 priority journal 140 Article 110 mouse 110 enzyme activation 104 Mice 102 animal cell 94 animal experiment 92 enzymology 82 physiology 82 animal tissue 78 protein expression 72 unclassified drug 72 signal transduction 70 drug effect 68 human 64 male 62 female 60 genetics 60 Enzyme Activation 58 drug effects 58 Humans 56 Female 52 rat 52